Add factory reset functionality and update identity service

- Introduced a new DELETE endpoint `/api/admin/maintenance/factory-reset` for a complete reset of the admin panel, removing all users except the current admin and clearing various data.
- Implemented the `FactoryReset` method in `AdminMaintenanceEndpoints` to handle the reset logic.
- Added a new method `ListAllUserIdsExceptAsync` in `IIdentityService` to retrieve user IDs excluding a specified user, aiding in the factory reset process.
- Updated the frontend to include a confirmation dialog for the factory reset action, enhancing user experience and safety.
- Enhanced localization support for the new factory reset feature in both Russian and English, ensuring clarity for all users.

backend/src/PnvPanel.Api/Endpoints/AdminMaintenanceEndpoints.cs

@@ -23,6 +23,7 @@ public static class AdminMaintenanceEndpoints
         admin
             .MapDelete("/apps/disabled", DeleteDisabledApps)
             .Produces<MaintenanceCleanupResponseDto>();
+        admin.MapDelete("/factory-reset", FactoryReset).Produces(StatusCodes.Status204NoContent);
 
         return app;
     }
@@ -58,6 +59,15 @@ public static class AdminMaintenanceEndpoints
         return ToResponse(result);
     }
 
+    private static async Task<IResult> FactoryReset(
+        ISender sender,
+        CancellationToken cancellationToken
+    )
+    {
+        var result = await sender.Send(new FactoryResetCommand(), cancellationToken);
+        return result.ToHttpResult();
+    }
+
     private static IResult ToResponse(Result<int> result) =>
         result.IsSuccess
             ? Results.Ok(new MaintenanceCleanupResponseDto(result.Value))

backend/src/PnvPanel.Application/Admin/Maintenance/FactoryResetCommand.cs

@@ -0,0 +1,11 @@
+using PnvPanel.Application.Common.Messaging;
+using PnvPanel.Application.Common.Models;
+
+namespace PnvPanel.Application.Admin.Maintenance;
+
+/// <summary>
+/// Полный сброс панели к состоянию свежего деплоя: все пользователи кроме текущего админа,
+/// конфиги, ноды/инбаунды, тикеты (+вложения), новости, аудит и кастомные роли удаляются;
+/// каталог приложений пересеивается из seed/client-apps.json. Необратимо.
+/// </summary>
+public sealed record FactoryResetCommand : ICommand<Result>;

backend/src/PnvPanel.Application/Admin/Maintenance/FactoryResetCommandHandler.cs

@@ -0,0 +1,121 @@
+using Microsoft.EntityFrameworkCore;
+using PnvPanel.Application.Auth;
+using PnvPanel.Application.Common.Interfaces;
+using PnvPanel.Application.Common.Messaging;
+using PnvPanel.Application.Common.Models;
+using PnvPanel.Domain.Audit;
+using PnvPanel.Domain.Configs;
+
+namespace PnvPanel.Application.Admin.Maintenance;
+
+public sealed class FactoryResetCommandHandler(
+    IAppDbContext dbContext,
+    IIdentityService identityService,
+    IRoleService roleService,
+    IXuiPanelGateway gateway,
+    IFileStorage fileStorage,
+    IClientAppCatalogSeeder catalogSeeder,
+    ICurrentUser currentUser
+) : ICommandHandler<FactoryResetCommand, Result>
+{
+    public async Task<Result> Handle(
+        FactoryResetCommand command,
+        CancellationToken cancellationToken
+    )
+    {
+        if (currentUser.UserId is not { } adminId)
+            return Result.Failure(AuthErrors.Unauthorized);
+
+        await RevokeAllConfigsOnPanelsAsync(cancellationToken);
+        await DeleteTicketAttachmentFilesAsync(cancellationToken);
+        WipeApplicationData();
+        await dbContext.SaveChangesAsync(cancellationToken);
+
+        // Пользователи/роли удаляются через Identity, а не через dbContext — коммитим сначала
+        // "плоские" данные выше, чтобы к этому моменту на них уже никто не ссылался.
+        var otherUserIds = await identityService.ListAllUserIdsExceptAsync(
+            adminId,
+            cancellationToken
+        );
+        foreach (var userId in otherUserIds)
+            await identityService.DeleteUserAsync(userId, cancellationToken);
+
+        var roles = await roleService.ListRolesAsync(cancellationToken);
+        foreach (var role in roles.Where(r => !r.IsSystem))
+            await roleService.DeleteRoleAsync(role.Id, cancellationToken);
+
+        // ClientApps уже пуста (удалена в WipeApplicationData + сохранена выше) — пересеиваем.
+        await catalogSeeder.SeedIfEmptyAsync(cancellationToken);
+
+        // Финальная запись — уже после очистки самого журнала, чтобы отметить факт сброса.
+        dbContext.AuditLogs.Add(
+            AuditLog.Create(
+                adminId,
+                "FactoryReset",
+                "System",
+                "all",
+                metadata: null,
+                AuditSource.Web
+            )
+        );
+        await dbContext.SaveChangesAsync(cancellationToken);
+
+        return Result.Success();
+    }
+
+    /// <summary>Best-effort — недоступная/уже удаляемая нода не должна блокировать сброс остального.</summary>
+    private async Task RevokeAllConfigsOnPanelsAsync(CancellationToken cancellationToken)
+    {
+        var configs = await dbContext
+            .VpnConfigs.AsNoTracking()
+            .Where(c => c.Status != ConfigStatus.Revoked)
+            .ToListAsync(cancellationToken);
+        if (configs.Count == 0)
+            return;
+
+        var inbounds = await dbContext.Inbounds.AsNoTracking().ToListAsync(cancellationToken);
+        var nodes = await dbContext.Nodes.AsNoTracking().ToListAsync(cancellationToken);
+
+        foreach (var config in configs)
+        {
+            var inbound = inbounds.FirstOrDefault(i => i.Id == config.InboundId);
+            var node = inbound is null ? null : nodes.FirstOrDefault(n => n.Id == inbound.NodeId);
+            if (inbound is null || node is null)
+                continue;
+
+            await gateway.RemoveClientAsync(
+                node,
+                inbound.RemoteInboundId,
+                config.ClientExternalId,
+                config.Protocol,
+                cancellationToken
+            );
+        }
+    }
+
+    private async Task DeleteTicketAttachmentFilesAsync(CancellationToken cancellationToken)
+    {
+        var attachments = await dbContext
+            .TicketAttachments.AsNoTracking()
+            .ToListAsync(cancellationToken);
+        foreach (var attachment in attachments)
+            await fileStorage.DeleteAsync(attachment.StoredFileName, cancellationToken);
+    }
+
+    private void WipeApplicationData()
+    {
+        dbContext.TicketAttachments.RemoveRange(dbContext.TicketAttachments);
+        dbContext.TicketComments.RemoveRange(dbContext.TicketComments);
+        dbContext.SupportTickets.RemoveRange(dbContext.SupportTickets);
+        dbContext.TrafficSamples.RemoveRange(dbContext.TrafficSamples);
+        dbContext.VpnConfigs.RemoveRange(dbContext.VpnConfigs);
+        dbContext.Inbounds.RemoveRange(dbContext.Inbounds);
+        dbContext.Nodes.RemoveRange(dbContext.Nodes);
+        dbContext.ActivationRequests.RemoveRange(dbContext.ActivationRequests);
+        dbContext.TelegramLoginRequests.RemoveRange(dbContext.TelegramLoginRequests);
+        dbContext.TelegramLinkTokens.RemoveRange(dbContext.TelegramLinkTokens);
+        dbContext.NewsPosts.RemoveRange(dbContext.NewsPosts);
+        dbContext.ClientApps.RemoveRange(dbContext.ClientApps);
+        dbContext.AuditLogs.RemoveRange(dbContext.AuditLogs);
+    }
+}

backend/src/PnvPanel.Application/Common/Interfaces/IClientAppCatalogSeeder.cs

@@ -0,0 +1,11 @@
+namespace PnvPanel.Application.Common.Interfaces;
+
+/// <summary>
+/// Сидинг стартового каталога клиентских приложений из seed/client-apps.json. Идемпотентно —
+/// не трогает таблицу, если в ней уже что-то есть (используется и при старте, и после полного
+/// сброса панели, когда таблица заведомо пуста).
+/// </summary>
+public interface IClientAppCatalogSeeder
+{
+    Task SeedIfEmptyAsync(CancellationToken cancellationToken);
+}

backend/src/PnvPanel.Application/Common/Interfaces/IIdentityService.cs

@@ -128,4 +128,11 @@ public interface IIdentityService
     Task<IReadOnlyCollection<long>> GetActivatedLinkedTelegramUserIdsAsync(
         CancellationToken cancellationToken
     );
+
+    /// <summary>Все Id пользователей, кроме указанного — для полного сброса панели (сохраняется
+    /// только текущий админ).</summary>
+    Task<IReadOnlyList<Guid>> ListAllUserIdsExceptAsync(
+        Guid exceptUserId,
+        CancellationToken cancellationToken
+    );
 }

backend/src/PnvPanel.Infrastructure/Apps/ClientAppCatalogSeeder.cs

@@ -0,0 +1,69 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+using PnvPanel.Application.Common.Interfaces;
+using PnvPanel.Domain.Apps;
+using PnvPanel.Infrastructure.Persistence;
+
+namespace PnvPanel.Infrastructure.Apps;
+
+internal sealed class ClientAppCatalogSeeder(
+    AppDbContext dbContext,
+    ILogger<ClientAppCatalogSeeder> logger
+) : IClientAppCatalogSeeder
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        PropertyNameCaseInsensitive = true,
+    };
+
+    public async Task SeedIfEmptyAsync(CancellationToken cancellationToken)
+    {
+        if (await dbContext.ClientApps.AnyAsync(cancellationToken))
+            return;
+
+        var path = Path.Combine(AppContext.BaseDirectory, "seed", "client-apps.json");
+        if (!File.Exists(path))
+        {
+            logger.LogWarning("Client app catalog seed file not found: {Path}", path);
+            return;
+        }
+
+        var json = await File.ReadAllTextAsync(path, cancellationToken);
+        var entries = JsonSerializer.Deserialize<List<ClientAppSeedEntry>>(json, JsonOptions) ?? [];
+
+        foreach (var entry in entries)
+        {
+            if (!Enum.TryParse<OsPlatform>(entry.OperatingSystem, ignoreCase: true, out var os))
+            {
+                logger.LogWarning(
+                    "Unknown OS '{Os}' in client app catalog seed — skipped",
+                    entry.OperatingSystem
+                );
+                continue;
+            }
+
+            var app = ClientApp.Create(
+                entry.Name,
+                new Uri(entry.DownloadUrl, UriKind.Absolute),
+                os,
+                entry.Description,
+                iconUrl: null,
+                entry.SortOrder
+            );
+            dbContext.ClientApps.Add(app);
+        }
+
+        await dbContext.SaveChangesAsync(cancellationToken);
+        logger.LogInformation("Seeded client app catalog: {Count} entries", entries.Count);
+    }
+
+    private sealed record ClientAppSeedEntry(
+        string Name,
+        string OperatingSystem,
+        string DownloadUrl,
+        string? Description,
+        int SortOrder,
+        bool IsEnabled
+    );
+}

backend/src/PnvPanel.Infrastructure/DependencyInjection.cs

@@ -7,6 +7,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.IdentityModel.Tokens;
 using PnvPanel.Application.Common.Interfaces;
+using PnvPanel.Infrastructure.Apps;
 using PnvPanel.Infrastructure.BackgroundJobs;
 using PnvPanel.Infrastructure.Identity;
 using PnvPanel.Infrastructure.Persistence;
@@ -135,6 +136,7 @@ public static class DependencyInjection
         services.AddScoped<IJwtTokenService, JwtTokenService>();
         services.AddScoped<IRefreshTokenService, RefreshTokenService>();
         services.AddScoped<IRoleService, RoleService>();
+        services.AddScoped<IClientAppCatalogSeeder, ClientAppCatalogSeeder>();
         // Один и тот же экземпляр CurrentUser на scope — и как ICurrentUser (чтение), и как
         // ICurrentUserSetter (запись, только для Telegram-бота, см. TelegramBotHostedService).
         services.AddScoped<CurrentUser>();

backend/src/PnvPanel.Infrastructure/Identity/DbInitializer.cs

@@ -1,11 +1,8 @@
 using System.Security.Cryptography;
-using System.Text.Json;
 using Microsoft.AspNetCore.Identity;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
-using PnvPanel.Domain.Apps;
-using PnvPanel.Infrastructure.Persistence;
+using PnvPanel.Application.Common.Interfaces;
 
 namespace PnvPanel.Infrastructure.Identity;
 
@@ -13,17 +10,12 @@ namespace PnvPanel.Infrastructure.Identity;
 public sealed class DbInitializer(
     RoleManager<AppRole> roleManager,
     UserManager<AppUser> userManager,
-    AppDbContext dbContext,
+    IClientAppCatalogSeeder clientAppCatalogSeeder,
     IOptions<AdminSeedOptions> adminSeedOptions,
     IOptions<RolesOptions> rolesOptions,
     ILogger<DbInitializer> logger
 )
 {
-    private static readonly JsonSerializerOptions JsonOptions = new()
-    {
-        PropertyNameCaseInsensitive = true,
-    };
-
     public async Task SeedAsync(CancellationToken cancellationToken = default)
     {
         await EnsureRoleAsync(
@@ -39,7 +31,7 @@ public sealed class DbInitializer(
             isSystem: true
         );
         await SeedAdminAsync();
-        await SeedClientAppsAsync(cancellationToken);
+        await clientAppCatalogSeeder.SeedIfEmptyAsync(cancellationToken);
     }
 
     private async Task EnsureRoleAsync(string name, int maxConfigs, int maxIpLimit, bool isSystem)
@@ -100,54 +92,4 @@ public sealed class DbInitializer(
         await userManager.AddToRoleAsync(admin, RoleNames.Admin);
         logger.LogInformation("Created admin account {Username}", options.Username);
     }
-
-    private async Task SeedClientAppsAsync(CancellationToken cancellationToken)
-    {
-        if (await dbContext.ClientApps.AnyAsync(cancellationToken))
-            return;
-
-        var path = Path.Combine(AppContext.BaseDirectory, "seed", "client-apps.json");
-        if (!File.Exists(path))
-        {
-            logger.LogWarning("Client app catalog seed file not found: {Path}", path);
-            return;
-        }
-
-        var json = await File.ReadAllTextAsync(path, cancellationToken);
-        var entries = JsonSerializer.Deserialize<List<ClientAppSeedEntry>>(json, JsonOptions) ?? [];
-
-        foreach (var entry in entries)
-        {
-            if (!Enum.TryParse<OsPlatform>(entry.OperatingSystem, ignoreCase: true, out var os))
-            {
-                logger.LogWarning(
-                    "Unknown OS '{Os}' in client app catalog seed — skipped",
-                    entry.OperatingSystem
-                );
-                continue;
-            }
-
-            var app = ClientApp.Create(
-                entry.Name,
-                new Uri(entry.DownloadUrl, UriKind.Absolute),
-                os,
-                entry.Description,
-                iconUrl: null,
-                entry.SortOrder
-            );
-            dbContext.ClientApps.Add(app);
-        }
-
-        await dbContext.SaveChangesAsync(cancellationToken);
-        logger.LogInformation("Seeded client app catalog: {Count} entries", entries.Count);
-    }
-
-    private sealed record ClientAppSeedEntry(
-        string Name,
-        string OperatingSystem,
-        string DownloadUrl,
-        string? Description,
-        int SortOrder,
-        bool IsEnabled
-    );
 }

backend/src/PnvPanel.Infrastructure/Identity/IdentityService.cs

@@ -364,6 +364,18 @@ internal sealed class IdentityService(
             .ToListAsync(cancellationToken);
     }
 
+    public async Task<IReadOnlyList<Guid>> ListAllUserIdsExceptAsync(
+        Guid exceptUserId,
+        CancellationToken cancellationToken
+    )
+    {
+        return await userManager
+            .Users.AsNoTracking()
+            .Where(u => u.Id != exceptUserId)
+            .Select(u => u.Id)
+            .ToListAsync(cancellationToken);
+    }
+
     private async Task<string> GetPrimaryRoleNameAsync(AppUser user)
     {
         var roles = await userManager.GetRolesAsync(user);